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1. WO2017129297 - FIBRE REACTIVE FORMAZAN DYES, THEIR PREPARATION AND THEIR USE

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What is claimed is:

1 . A reactive dye of formula


wherein

Z-i and Z2 are each independently of the other vinyl or a radical -CH2-CH2-Y and Y is a group removable under alkaline conditions,

n is the number 1 , 2, 3 or 4,

m is the number 2, 3 or 4,

q is the number 0 or 1 , and

the substituents -(S03H)n , -SO2-Z1 and -NH-CO-(CH2)m-S02-Z2 are bound to the benzene rings A, B and/or C, said benzene rings A, B and/or C are optionally further substituted by at least one substituent selected from the group Ci-C4alkyl, CrC4alkoxy and halogen.

2. A reactive dye according to claim 1 , wherein

Y is -CI, -Br, -F, -OSO3H, -SSO3H, -OCO-CH3, -OP03H2, -OCO-C6H5, -OS02-C C4alkyl or -OS02-N(CrC4alkyl)2.

3. A reactive dye according to either claim 1 or claim 2, wherein

Y is -CI or -OS03H.

4. A reactive dye according to any one of claims 1 to 3, wherein

n is the number 2.

5. A reactive dye according to any one of claims 1 to 4, wherein

m is the number 3.

6. A reactive dye according to any one of claims 1 to 5, wherein

q is the number 1 .

7. A reactive dye according to any one of claims 1 to 6, wherein

the benzene rings A, B and/or C are devoid of further substituents from the group Ci-C4alkyl, CrC4alkoxy and halogen.

8. A reactive dye according to claim 1 , wherein

Z-i and Z2 are each independently of the other vinyl or a radical -CH2-CH2-Y and Y is -CI or -OS03H,

n is the number 2,

m is the number 3,

q is the number 1 , and

the benzene rings A, B and/or C are devoid of further substituents from the group CrC4alkyl, CrC4alkoxy and halogen.

9. A reactive dye according to claim 1 , wherein the reactive dye of formula (1 ) is a dye of formula


wherein

Z-i is vinyl or a radical -CH2-CH2-Y and Y is -OS03H, and

Z2 is vinyl or a radical -CH2-CH2-Y and Y is -CI.

10. A process for the preparation of the reactive dye of formula (1 ), which comprises reacting with one another a compound of formula


and a compound of formula

X-CO-(CH2)m-S02-Z2 (3)

wherein X is a replaceable group,

Z-i and Z2 are each independently of the other vinyl or a radical -CH2-CH2-Y and Y is a group removable under alkaline conditions,

n is the number 1 , 2, 3 or 4,

m is the number 2, 3 or 4,

q is the number 0 or 1 , and

the substituents -(S03H)n , -S02-Z-i and -NH2 are bound to the benzene rings A, B and/or C, said benzene rings A, B and/or C are optionally further substituted by at least one substituent selected from the group CrC4alkyl, Ci-C4alkoxy and halogen.

1 1 . Use of a reactive dye according to any one of claims 1 to 9 or of a reactive dye obtained according to claim 10 in dyeing or printing hydroxyl-group-containing or nitrogen-containing fibre materials.

12. Use according to claim 1 1 , wherein cellulosic fibre materials, especially cotton-containing fibre materials, are dyed or printed.

13. A process for the dyeing or printing of hydroxyl-group-containing or nitrogen-containing fibre materials, wherein a reactive dye according to any one of claims 1 to 9 or a reactive dye obtained according to claim 10 is used.

14. Aqueous inks comprising the dye of formula (1 ).

15. A process for ink-jet printing, wherein an aqueous ink according to claim 14 is used.